Table 1.

Comparison of PCB_i congener depletion (%) by Paraburkholderia xenovorans LB400 between literature values and present work.

Congener Description			% Depletion of PCBi
Structural Class	BZ Congener#	Substitution Pattern	Present work	Bedard et al. (1986)	Bopp et al. (1986)	Nadim et al. (1987)	Gibson et al. (1993)
Open 2,3 and 3,4 Sites	4	2,2′	100	80–100^d	100	100	100/100^e
	5	2,3		80–100	100	100	100/100
	8	2,4′	99	80–100	100	100	100/100
	9	2,5				100
	10	2,6				40
	16	2,2′,3	99
	17	2,2′,4	99
	18	2,2′,5	99	80–100	100	100	100/100
	19^a	2,2′,6	74
	22	2,3,4′	97
	25	2,3′,4	97
	26/29^b	2,3′,5/2,4,5	98
	27	2,3′,6	98
	30	2,4,6				25
	31	2,4′,5	98	80–100	100	100	98/100
	32	2,4′,6	63
	33	2,3′,4′	97
	40	2,2′,3,3′	81	80–100	100		100/100
	41	2,2′,3,4	94
	42	2,2′,3,4′	87
	43	2,2′,3,5	94
	44/47^c	2,2′,3,5’/2,2′,4,4′	89	80–100/80–100	100/100	100/100	100/81/86
	45	2,2′,3,6	66
	46	2,2′,3,6′	70
	48	2,2′,4,5	95
	51	2,2′,4,6′	37
	53	2,2′,5,6′	92			100
	56	2,3,3′,4′	92
	59/75	2,3,3′,6/2,4,4′,6	81
	63	2,3,4′,5	64
	64	2,3,4′,6	46
	70/74	2,3′,4′,5/2,4,4′,5	73	80–100/NA	100/NA		100/NA
	82	2,2′,3,3’,4	50
	84	2,2′,3,3′,6	67
	87	2,2′,3,4,5′	67	80–100	100	100	97/96
	91	2,2′,3,4′,6	41
	97/109/119	2,2′,3,4′,5’/2,3,3′,4,6/2,3′,4,4′,6	53	40–59/NA/NA	90/NA/NA	100/NA/0	50/53
	110	2,3,3′,4′,6	49
	129/138/163	2,2′,3,3′,4,5/2,2′,3,4,4 ′,5’/2,3,3′,4′,5,6	26
	132	2,2′,3,3′,4,6	25
	147/149	2,2′,3,4′,5,6/2,2′,3,4′,5′,6	27
Open 3,4 Sites	52	2,2′,5,5′	96	80–100	100	100	100/100
	54	2,2′,6,6′				0^g
	92	2,2′,3,5,5′	80
	95	2,2′,3,5′,6	70
	101	2,2′,4,5,5′	78	80–100	100	100	100/98
	103	2,2′,4,5,6′				75
	135	2,2′,3,3′,6,6′				35
Open 2,3 Sites	15	4,4′	81	60–79	47	50	25/11
	28	2,4,4′	84	80–100	98	100	89/54
	37	3,4,4′	41
	47	2,2′,4,4′	@44/47^f	80–100	100	100	81/86
	60	2,3,4,4′	39
	66	2,3′,4,4′	48	40–59	64	65	43/34
	75	2,4,4′,6	@59/75			0
	77	3,3′,4,4′	42	40–59	41	0	6/11
	85	2,2′,3,4,4′	42
	99	2,2′,4,4′,5	56
	100	2,2′,4,4′,6				0
	118	2,3′,4,4′,5	40			0
Blocked 2,3 & 3,4 Sites	121	2,3′,4,5′,6				0
	153/168	2,2′,4,4′,5,5’/2,3′,4,4′,5′,6	30	40–59/NA	59/45	70/NA	[41/61]/NA
	155	2,2′,4,4′,6,6′				0

^{a –}

PCB congeners with BZ# in bold have more than two ortho-chlorine substituents.

^{b –}

PCB congeners separated with a forward slash co-elute with each other.

^{c –}

PCB congeners underlined or in italics belong to the corresponding structural class separate from the PCB congener(s) it co-elutes with i.e. PCB congeners that are underlined belong to the structural class with open 2,3 sites and those in italics belong to that with blocked 2,3 and 3,4 sites.

^{d –}

No specific values were given by Bedard et al. (1986), only approximate ranges.

^{e –}

Gibson et al. (1993) assayed the biodegradation ability of LB400 using both whole cells and cell extracts from LB400. Depletion percentage by whole cells is given first, followed by that of cell extracts.

^{f –}

Since some congeners that are both present in the Aroclor 1248 mixture co-elute in the analytical method used in the present work, a determination cannot be made about exactly how much of either congener was depleted but the ‘@’ symbol references the first entry in the table for the co-eluting congeners.

^{g –}

Zero values indicate that none of the PCB congener was depleted whereas a blank space indicates the congener was not detected in the corresponding work. Congeners not detected in the present work are not present in Aroclor 1248 but were screened for.